JP2011149000A - Insect pest control resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide e.g., an insect pest control resin composition. <P>SOLUTION: The insect pest control resin composition includes a thermoplastic resin, a pyrethroid compound, piperonyl butoxide, and a phosphorus-containing antioxidant and can serve as a raw material for insect pest control nets. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a resin composition, a resin molded body, and a net for controlling pests.

  An insect repellent fiber containing an antioxidant is disclosed in Patent Document 1. Patent Document 2 discloses phosphites as antioxidants. Patent Documents 3 and 4 show nets containing a pest control component. Furthermore, Patent Document 5 discloses an insect-repellent fiber containing a pyrethroid compound and a synergist such as piperonyl butoxide.

JP 2008-95267 A JP-A-10-273494 JP 2008-13508 A JP-A-8-163950 Japanese Patent Publication No. 2-55551

  An object of the present invention is to provide a resin composition or the like for controlling pests, which has a stronger effect.

  1st aspect of this invention is a resin composition for insect pest control characterized by containing a thermoplastic resin, a pyrethroid compound, piperonyl butoxide, and phosphorus antioxidant.

  According to a second aspect of the present invention, there is provided a pest control resin molded article, which is formed by melt-molding the pest control resin composition of the first aspect.

  The third aspect of the present invention is a pest control characterized by being formed by knitting or weaving the pest control resin molded body of the second aspect, which is a thread, so as to form a number of meshes. The net.

  In the present invention, the pyrethroid compound is preferably permethrin. Moreover, as a phosphorus antioxidant, the compound shown by general formula (I) is preferable, and especially the compound shown by general formula (II), ie, 6- [3- (3-t-butyl-4-]. Hydroxy-5-methyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d, f] [1,3,2] -dioxaphosphine is preferred.

  According to the pest control resin composition of the first aspect, it is possible to exert a stronger pest control effect than before.

  According to the pest control resin molded article of the second aspect, the handleability, such as storage or transportation, of the pest control resin composition of the first aspect can be improved.

  According to the pest control net of the third aspect, pests can be controlled more effectively.

It is a partial view of the pest control net of the present invention having a knitted structure. It is a partial view of the pest control net of the present invention having a woven structure.

  The pest control resin composition of the present invention contains a thermoplastic resin, a pyrethroid compound, piperonyl butoxide, and a phosphorus-based antioxidant. The pest control resin composition of the present invention can be obtained by mixing, melting and kneading these components, molding, or other methods.

  The compounding amount of each component in the pest control resin composition of the present invention is 30 to 99.9799% by weight of a thermoplastic resin, 0.01 to 50% by weight of a pyrethroid compound, 0.01 to 50% by weight of piperonyl butoxide, and phosphorus. 0.0001-20% by weight of antioxidant is preferred, thermoplastic resin 50-99.799% by weight, pyrethroid compound 0.1-25% by weight, piperonyl butoxide 0.1-25% by weight, and phosphorus antioxidant 0 0.001 to 10% by weight is more preferable.

(Thermoplastic resin)
Thermoplastic resins are used as carriers for holding pyrethroid compounds, piperonyl butoxide, and phosphorus antioxidants. As the thermoplastic resin, polyolefin resin, polyvinyl alcohol, polyvinyl acetate, polycarbonate, polyester, polyamide, polystyrene, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer, polyvinyl chloride, or the like can be used.

In addition, as a thermoplastic resin, polyolefin resin is preferable. As the polyolefin resin, the following compounds are preferable.
(I) Homopolymer of α-olefin: For example, polyethylene, polypropylene and the like.
(Ii) ethylene-α-olefin copolymer: for example, ethylene-propylene copolymer, ethylene-butene-1 copolymer, ethylene-4-methyl-1-pentene copolymer, or ethylene-hexene copolymer Such.
(Iii) Copolymer of an organic carboxylic acid derivative having an ethylenically unsaturated bond and ethylene: for example, ethylene-methyl methacrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, or ethylene -Vinyl acetate-methyl methacrylate copolymer and the like.

(Pyrethroid compound)
Examples of pyrethroid compounds include acrinathrin, allethrin, d-arethrin, dd-arethrin, beta-cyfluthrin, bifenthrin, cycloprotorin, cythruthrin (cyfluthrin) cyhalothrin, cypermethrin, dimethylfluthrin, empentrin, deltamethrin, teralesrine, teflutrin, esfenvalerate, ethofenphenate. proprathrin, fenvalerate, flucitrinate, flufenprox, flumethrin, fluvalinate, fluvaline, profluthrin, fenfenproline. , Permethrin, benfluthrin, praretrin, pyrethrins, resmethrin, d-resmethrin, sigma-cypermethrin, silaflufen ), Tefluthrin, tralomethrin, transfluthrin, tetramethrin, d-tetramethrin, phenothrin, d-phenothrin, cyphenothrin (cyphenthrin) ), Sialpha cypermethrin, zeta-cypermethrin, lambda-cyhalothrin, gamma-cyhalothrin, furamethrin, taufulvalinate, taufulvalinate Meto Examples include fluthrin and natural pyrethrin.

  These pyrethroid compounds can be used alone or in combination of two or more. Some of the above compounds have optical isomers, stereoisomers, geometric isomers, etc., but the pyrethroid compounds of the present invention include isomers and mixtures thereof.

(Piperonyl butoxide)
Piperonyl butoxide is a synergist and its chemical name is as follows.
5-[[2- (2-Butoxyethoxy) ethoxy] methyl] -6-propyl-1,3-benzodioxole

(Phosphorus antioxidant)
As the phosphorus-based antioxidant, it is preferable to use a compound represented by the general formula (I).

In the general formula (I), the substituents R ¹ , R ² , R ⁴ , and R ⁵ are each independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, An alkylcycloalkyl group having 6 to 12 carbon atoms, or an aralkyl group or phenyl group having 7 to 12 carbon atoms is represented.

In particular, R ¹ , R ² , and R ⁴ are preferably an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or an alkylcycloalkyl group having 6 to 12 carbon atoms, and R ⁵ As a hydrogen atom, a C1-C8 alkyl group, or a C5-C8 cycloalkyl group is preferable. Here, typical examples of the alkyl group having 1 to 8 carbon atoms include, for example, methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, t- Examples include pentyl, i-octyl, t-octyl, and 2-ethylhexyl. Moreover, typical examples of the cycloalkyl group having 5 to 8 carbon atoms include cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl. Moreover, typical examples of the alkylcycloalkyl group having 6 to 12 carbon atoms include 1-methylcyclopentyl, 1-methylcyclohexyl, 1-methyl-4-i-propylcyclohexyl, and the like. Furthermore, typical examples of the aralkyl group having 7 to 12 carbon atoms include benzyl, α-methylbenzyl, α, α-dimethylbenzyl, and the like.

Especially, as R < ¹ > and R < ⁴ >, t-alkyl groups, such as t-butyl, t-pentyl, or t-octyl; cyclohexyl or 1-methylcyclohexyl group is preferable. R ² is preferably an alkyl group having 1 to 5 carbon atoms such as methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, or t-pentyl. In particular, methyl, t-butyl or t-pentyl is preferred. R ⁵ is a hydrogen atom, methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, t-pentyl, or other alkyl having 1 to 5 carbon atoms. Groups are preferred.

The substituent R ³ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Examples of the alkyl group having 1 to 8 carbon atoms include the same alkyl groups as described above. R ³ is preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and particularly preferably a hydrogen atom or a methyl group.

The substituent X represents a simple bond, a sulfur atom, or a —CHR ⁶ — group (R ⁶ represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms). Examples of the alkyl group or cycloalkyl group of R ⁶ include the same alkyl group or cycloalkyl group as described above. X is preferably a simple bond; a methylene group; or a methylene group substituted by methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl or the like.

Substituent A is an alkylene group having 2 to 8 carbon atoms or * -COR ⁷ -group (R ⁷ represents a simple bond or an alkylene group having 1 to 8 carbon atoms, and * is bonded to the oxygen side. Represents). Representative examples of the alkylene group for R ⁷ include, for example, ethylene, propylene, butylene, pentamethylene, hexamethylene, octamethylene, 2,2-dimethyl-1,3-propylene, and propylene is preferred. * Indicates that the carbonyl is bonded to the phosphite oxygen.

  One of the substituents Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Represents an alkyl group. Examples of the alkyl group having 1 to 8 carbon atoms include the same alkyl groups as described above. As a C1-C8 alkoxy group, the alkoxy group whose alkyl part is the same as the said C1-C8 alkyl is mentioned, for example. As a C7-C12 aralkyloxy group, the aralkyloxy group whose aralkyl part is the same as the said C7-C12 aralkyl is mentioned, for example.

As the phosphorus-based antioxidant, specifically, one or more selected arbitrarily from the following compound group can be used.
・ Phenyl diisodecyl phosphite ・ Diphenyl isooctyl phosphite ・ Diphenyl isodecyl phosphite ・ Triphenyl phosphite ・ Trisnonyl phenyl phosphite ・ Tris- (nonylphenyl) phosphite or tris- (dinonylphenyl) phosphite or these Mixture • Distearyl-pentaerythritol diphosphite • Bis (nonylphenyl) pentaerythritol diphosphite • 4,4′-isopropylidenediphenol C ₁₂ -C ₁₅ alkyl phosphite • 4,4′-butylidenebis (3-methyl) -6-t-butylphenyl-di-tridecyl phosphite)
1,1,3-tris (2-methyl-4-di-tridecyl phosphite 5-t-butylphenyl) butane 3,4,5,6-dibenzo-1,2-oxaphosphan-2- Oxides ・ Trilauryl trithiophosphite ・ Trisisodecyl phosphite ・ Tris (tridecyl) phosphite ・ Phenyl di (tridecyl) phosphite ・ Diphenyl tridecyl phosphite ・ Phenyl-bisphenol A pentaerythritol diphosphite ・ 3,5-di- t-butyl-4-hydroxybenzylphosphonic acid diethyl ester 2- [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl 2,2 ′-(3,3 ′, 5,5′-Tetra-t-butylbiphenyl) phosphite 2- [3- (3-t-butyl -4-hydroxy-5-methylphenyl) propionyloxy] ethyl 2,2'-methylenebis (6-tert-butyl-4-methylphenyl) phosphite 2- [3- (3,5-di-tert-butyl) -4-hydroxyphenyl) propionyloxy] ethyl 2,2 '-(3,3', 5,5'-tetra-t-butylbiphenyl) phosphite 2- [3- (3,5-di-t- (Butyl-4-hydroxyphenyl) propionyloxy] ethyl 2,2′-methylenebis (6-tert-butyl-4-methylphenyl) phosphite 3- (3,5-di-tert-butyl-4-hydroxyphenyl) Propyl 2,2 ′-(3,3 ′, 5,5′-tetra-t-butylbiphenyl) phosphite 3- (3,5-di-t-butyl-4-hydroxyphenyl) propyl 2,2 ′ -Michile Bis (6-t-butyl-4-methylphenyl) phosphite 3- (3-t-butyl-4-hydroxy-5-methylphenyl) propyl 2,2′-methylenebis (6-t-butyl-4- Methylphenyl) phosphite.
Tris- (2,4-di-t-butylphenyl) phosphiteBis (2,4-di-t-butylphenyl) pentaerythritol diphosphiteBis (2,6-di-t-butyl-4 -Methylphenyl) pentaerythritol diphosphiteBis (2,4-di-cumylphenyl) pentaerythritol diphosphiteTetrakis (2,4-di-t-butylphenyl) -4,4'-biphenylenediphosphonite 3- (3-t-butyl-4-hydroxy-5-methylphenyl) propyl 2,2 '-(3,3', 5,5'-tetra-t-butylbiphenyl) phosphiteBis- [2 , 4-Di-t-butyl (6-methyl) phenyl] ethyl phosphite

  As the phosphorus-based antioxidant, in particular, a compound represented by the general formula (II), that is, 6- [3- (3-tert-butyl-4-hydroxy-5-methyl) propoxy] -2,4,8 , 10-tetra-t-butyldibenz [d, f] [1,3,2] -dioxaphosphine is preferably used. This compound is commercially available under the trade name “SumilizerGP” (manufactured by Sumitomo Chemical Co., Ltd.). “Sumilizer” is a registered trademark of Sumitomo Chemical Co., Ltd.

  The pest control resin composition of the present invention is an insecticide such as a carbamate compound, an organophosphorus compound, a neonicotinoid compound; an antifungal agent, an antibacterial agent, a pigment, and an aromatic agent, as long as the effects of the present invention are not impaired. , Deodorant, spreading agent, UV absorber, light stabilizer, lubricant, anti-blocking agent, antistatic agent, surfactant, filler, refractory agent, plasticizer, rust inhibitor, etc. May be contained.

  According to the pest control resin composition of the present invention, it is possible to exert a stronger pest control effect than before.

(Production method)
The pest control resin composition of the present invention can be produced, for example, as in the following (i) (ii) or (iii).
(I) A thermoplastic resin, three kinds of components (pyrethroid compound, piperonyl butoxide, and phosphorus antioxidant) and an optional compounding agent are mixed with stirring, and the resulting mixture is melt-kneaded.
(Ii) Stir and mix the thermoplastic resin, at least one component selected from the three components (pyrethroid compound, piperonyl butoxide, and phosphorus-based antioxidant) and any compounding agent; The obtained mixture is melt-kneaded to obtain a resin molded body. And the component which was not selected is coated on the surface of a resin molding.
(Iii) A thermoplastic resin and an optional compounding agent are stirred and mixed, and the resulting mixture is melt-kneaded to obtain a resin molded body. And three types of structural components (a pyrethroid compound, piperonyl butoxide, and phosphorus antioxidant) are coated on the surface of a resin molding.

  Alternatively, one or more components selected from a pyrethroid compound, piperonyl butoxide, and a phosphorus antioxidant may be supported on a carrier and then melt-kneaded with a thermoplastic resin to produce the resin composition of the present invention. it can. Examples of the carrier include silica compounds, zeolites, viscous minerals, metal oxides, mica, hydrotalcites, and organic carriers. Silica compounds include amorphous silica and crystalline silica, and examples thereof include powdered silicic acid, finely powdered silicic acid, acid clay, diatomaceous earth, quartz, and white carbon. Examples of zeolites include A-type zeolite and mordenite, and examples of viscosity minerals include montmorillonite, saponite, beidellite, bentonite, kaolinite, halloysite, nacrite, decait, anoxite, illite, and sericite. Examples of the metal oxide include zinc oxide, magnesium oxide, aluminum oxide, iron oxide, copper oxide, and titanium oxide. Examples of the mica include mica and vermiculite. And hydrotalcite, smectite, etc., and organic carriers include charcoal (charcoal, peat, grass charcoal, etc.), polymer beads (microcrystalline cellulose, polystyrene beads, acrylate beads, methacrylate esters) , Polyvinyl alcohol Over's, etc.), and the crosslinked polymer beads and the like thereof, and the like. In addition, pearlite, gypsum, ceramic, volcanic rocks and the like can be mentioned. As the carrier, an amorphous inorganic carrier is preferable, and amorphous silica is more preferable.

  The pest control resin molded article of the present invention can be formed, for example, by melt molding the pest control resin composition of the present invention. As a production method, a method usually used in resin molding can be used, and examples thereof include extrusion molding, injection molding, blow molding, compression molding, powder molding, and press molding. Further, a part of the raw material can be coated on the molded body by, for example, a dipping method, a spray method, or the like.

  Also, a master batch may be produced using the pest control resin composition of the present invention, and a pest control resin molded product may be produced by the above-described method using the master batch and a thermoplastic resin.

  You may manufacture the pellet which has a core-sheath structure using the resin composition for insect pest control of this invention. Specific examples include pellets in which the core layer is made of the pest control resin composition of the present invention and the sheath layer is made of an arbitrary thermoplastic resin. Such pellets are suitable as a master batch.

  Examples of the pest control resin molded body of the present invention include films, sheets, wallpaper, curtains, flooring materials, packing materials, hoses, tapes, tubes, pipes, bags, tents and turf, warmth, awnings, electric wires, cables, Sheath, thread, tooth, rope, filter, gut, toothbrush hair, shoes, bag, clothing, electronic equipment, electrical equipment, home appliances, sports equipment, office equipment, vehicle equipment, transport equipment, containers, cases, etc. Logistics materials; Household goods and parts used for homes; Pet goods such as kennels, mats, sheets, collars, tags, etc., including humans; pets such as dogs, cats and birds; cows It is used as an insect repellent product for livestock such as pigs, sheep and birds. The film or sheet can be formed into a desired shape by vacuum forming or the like.

  The pest control net of the present invention is formed by knitting or weaving the yarn obtained by spinning the pest control resin composition of the present invention so as to form a large number of meshes. The pest control net of the present invention has a knitted structure when formed by knitting, and has a woven structure when formed by weaving. FIG. 1 shows an example of a knitted net formed by knitting the yarn 1 so as to form a large number of meshes 3, and FIG. 2 shows that the yarn 1 forms a large number of meshes 3. 1 shows an example of a woven net formed by weaving. The pest control net of the present invention preferably has a knitted structure.

  The size of the mesh 3 is appropriately set according to the length of the pest to be controlled, and is preferably such that the pest contacts the net when attempting to pass through the net. Generally, the size (hole size) of the mesh 3 is in the range of 2 to 5 mm, preferably 2 to 4 mm.

  The yarn 1 is preferably a monofilament having a predetermined thickness. According to this, knitting work and weaving work become easy. In this case, the “predetermined thickness” is a thickness capable of maintaining the strength as a pest control net. Generally, when the yarn 1 is a monofilament, it is preferable to use a monofilament in the range of 100 to 350 denier.

  In the pest control net of the present invention, the approaching pest touches the thread 1 when trying to pass through the mesh 3. Therefore, the pests are reliably controlled.

  In addition, according to the pest control net of the present invention, various harmful insects can be controlled. In particular, the following flying pests can be controlled. For example, house mosquitoes such as Culex mosquitoes, mosquito mosquitoes, etc .; Aedes such as Aedes aegypti, Aedes albopictus; Anopheles such as Aedes albopictus; Chironomidae; Fleas; abs; flyfish; sand flies; nukaka, tsetse flies, sand turtles;

  Examples of the pest control net of the present invention will be described below. The present invention is not limited to these examples.

[Example 1]
In a super mixer, 10.0 parts by weight of amorphous silica, 10.0 parts by weight of permethrin, 7.0 parts by weight of zinc stearate, 1.0 part by weight of “SumilizerGP”, and 0.4 parts by weight of BHT The mixture was stirred and mixed to obtain powder A. To a place where polyethylene was melted at 150 ° C. with a single screw extruder, powder A was added to 28.4 parts by weight with respect to 62 parts by weight of polyethylene and kneaded, and piperonyl butoxide was further added using an infusion pump. In addition to kneading so as to be 5.0 parts by weight, the melt-kneaded product was extruded from a die into a strand shape, cooled with water, and then cut with a pelletizer to obtain cylindrical master batch pellets.

  Next, 20.0 parts by weight of the obtained master batch pellets and 80.0 parts by weight of polyethylene were stirred and mixed. Next, monofilaments were spun from the obtained mixture at a processing temperature of 240 ° C. Then, the obtained resin yarn was knitted so as to form a large number of meshes, thereby producing a net A. Thereby, the pest control net of the present invention was obtained. The mesh size was set so that the number of holes per 6.45 cm 2 was 100.

[Example 2]
In a super mixer, 10.0 parts by weight of amorphous silica, 10.0 parts by weight of permethrin, 7.0 parts by weight of zinc stearate, 5.5 parts by weight of “SumilizerGP”, and 0.4 parts by weight of BHT The mixture was stirred and mixed to obtain powder B. To the place where polyethylene was melted at 150 ° C. with a single screw extruder, powder B was added and kneaded to 32.9 parts by weight with respect to 62 parts by weight of polyethylene, and piperonyl butoxide was further added using an infusion pump, In addition to kneading so as to be 5.0 parts by weight, the melt-kneaded product was extruded from a die into a strand shape, cooled with water, and then cut with a pelletizer to obtain cylindrical master batch pellets.

  Next, 20.0 parts by weight of the obtained master batch pellets and 80.0 parts by weight of polyethylene were mixed with stirring. Next, monofilaments were spun from the obtained mixture at a processing temperature of 240 ° C. Then, the obtained resin yarn was knitted so as to form a large number of meshes, thereby producing a net B. Thereby, the pest control net of the present invention was obtained. The mesh size was set so that the number of holes per 6.45 cm 2 was 100.

[Example 3]
10.0 parts by weight of amorphous silica, 7.0 parts by weight of zinc stearate, 5.5 parts by weight of “SumilizerGP”, and 0.4 parts by weight of BHT are stirred and mixed with a super mixer to obtain powder C. . To a place where polyethylene was melted at 150 ° C. with a single screw extruder, powder C was added to 22.9 parts by weight with respect to 62 parts by weight of polyethylene, kneaded, and piperonyl butoxide was further added using an infusion pump, In addition to kneading so as to be 5.0 parts by weight, the melt-kneaded product is extruded from a die into a strand shape, cooled with water, and then cut with a pelletizer to obtain cylindrical master batch pellets.

  Next, 20.0 parts by weight of the obtained master batch pellets and 80.0 parts by weight of polyethylene are stirred and mixed. Next, monofilaments are spun from the obtained mixture at a processing temperature of 240 ° C. Then, the obtained resin yarn is knitted so as to form a large number of meshes, thereby producing a net C. The mesh size is set so that the number of holes per 6.45 cm 2 is 100.

  On the other hand, 10.0 parts by weight of permethrin and 3.0 parts by weight of propylene glycol are dissolved in 87.0 parts by weight of alcohol to obtain a spray liquid S1.

  Then, spray C1 is sprayed on the net C and allowed to air dry for 24 hours. Thereby, the pest control net | network of this invention is obtained.

[Example 4]
10.0 parts by weight of amorphous silica, 7.0 parts by weight of zinc stearate, 5.5 parts by weight of “SumilizerGP”, and 0.4 parts by weight of BHT are stirred and mixed with a super mixer to obtain powder C. . To the place where polyethylene was melted at 150 ° C. with a single screw extruder, powder C was added to 22.9 parts by weight with respect to 62 parts by weight of polyethylene and kneaded, and the melt-kneaded product was extruded from a die into strands. After water cooling, it is cut with a pelletizer to obtain cylindrical master batch pellets.

  Next, 20.0 parts by weight of the obtained master batch pellets and 80.0 parts by weight of polyethylene are stirred and mixed. Next, monofilaments are spun from the obtained mixture at a processing temperature of 240 ° C. Then, the obtained resin yarn is knitted so as to form a large number of meshes, thereby producing a net D. The mesh size is set so that the number of holes per 6.45 cm 2 is 100.

  On the other hand, 10.0 parts by weight of permethrin, 5.0 parts by weight of piperonyl butoxide and 3.0 parts by weight of propylene glycol are dissolved in 82.0 parts by weight of alcohol to obtain a spray liquid S2.

  Then, the spray liquid S2 is sprayed on the net D and allowed to air dry for 24 hours. Thereby, the pest control net | network of this invention is obtained.

[Example 5]
10.0 parts by weight of amorphous silica, 7.0 parts by weight of zinc stearate, 5.5 parts by weight of “SumilizerGP”, and 0.4 parts by weight of BHT are stirred and mixed with a super mixer to obtain powder C. . To a place where polyethylene was melted at 150 ° C. with a single screw extruder, powder C was added to 22.9 parts by weight with respect to 62 parts by weight of polyethylene, kneaded, and piperonyl butoxide was further added using an infusion pump, In addition to kneading so as to be 5.0 parts by weight, the melt-kneaded product is extruded from a die into a strand shape, cooled with water, and then cut with a pelletizer to obtain cylindrical master batch pellets.

  Next, 20.0 parts by weight of the obtained master batch pellets and 80.0 parts by weight of polyethylene are stirred and mixed. Next, monofilaments are spun from the obtained mixture at a processing temperature of 240 ° C. Then, the obtained resin yarn is knitted so as to form a large number of meshes, thereby producing a net C. The mesh size is set so that the number of holes per 6.45 cm 2 is 100.

  The net C is immersed in an alcohol solution of permethrin 10.0% (w / v), taken out, and then air-dried for 24 hours. Thereby, the pest control net | network of this invention is obtained.

[Example 6]
10.0 parts by weight of amorphous silica, 7.0 parts by weight of zinc stearate, 5.5 parts by weight of “SumilizerGP”, and 0.4 parts by weight of BHT are stirred and mixed with a super mixer to obtain powder C. . To the place where polyethylene was melted at 150 ° C. with a single screw extruder, powder C was added to 22.9 parts by weight with respect to 62 parts by weight of polyethylene and kneaded, and the melt-kneaded product was extruded from a die into strands. After water cooling, it is cut with a pelletizer to obtain cylindrical master batch pellets.

  Next, 20.0 parts by weight of the obtained master batch pellets and 80.0 parts by weight of polyethylene are stirred and mixed. Next, monofilaments are spun from the obtained mixture at a processing temperature of 240 ° C. Then, the obtained resin yarn is knitted so as to form a large number of meshes, thereby producing a net D. The mesh size is set so that the number of holes per 6.45 cm 2 is 100.

  Then, the net D is immersed in an alcohol solution of 10.0% (w / v) permethrin and 5.0% (w / v) piperonyl butoxide, taken out, and then air-dried for 24 hours. Thereby, the pest control net | network of this invention is obtained.

[Comparative Example 1]
10.0 parts by weight of amorphous silica, 10.0 parts by weight of permethrin, 7.0 parts by weight of zinc stearate, and 0.4 parts by weight of BHT were stirred and mixed with a super mixer to obtain powder C. To a place where polyethylene was melted at 150 ° C. with a single screw extruder, powder C was added to 27.4 parts by weight with respect to 62 parts by weight of polyethylene and kneaded, and piperonyl butoxide was further added using an infusion pump, In addition to kneading so as to be 5.0 parts by weight, the melt-kneaded product was extruded from a die into a strand shape, cooled with water, and then cut with a pelletizer to obtain cylindrical master batch pellets.

  Next, 20.0 parts by weight of the obtained master batch pellets and 80.0 parts by weight of polyethylene were mixed with stirring. Next, monofilaments were spun from the obtained mixture at a processing temperature of 240 ° C. Then, the obtained resin yarn was knitted so as to form a large number of meshes, thereby producing a net. The mesh size was set so that the number of holes per 6.45 cm 2 was 100.

[Test example]
(Test method)
A section of 10 × 10 cm size was cut out from the produced net as a sample. The sample was washed with 200 ml of acetone and stored for 2 hours in a constant temperature bath at 70 ° C., and then subjected to the test.

  The test was conducted as follows. That is, the sample was fixed to a flat surface, and a petri dish having a diameter of about 4 cm was put on the sample. Next, 10 female adults of Culex quinquefasciatus were released into a petri dish and left for 3 minutes before being released into another cage. Then, the number of female mosquitoes knocked down after a certain time was counted.

(result)
The knockdown rate after 20 minutes was 50% in Example 1 and 46% in Example 2, but 18% in Comparative Example 1.

  As described above, the pest control net of the present invention can control pests more effectively than conventional ones.

  Since the pest control resin composition of the present invention can be used as a raw material for a pest control net capable of controlling pests more effectively, it has great industrial utility value.

    1 thread 3 mesh

Claims (12)

  A pest control resin composition comprising a thermoplastic resin, a pyrethroid compound, piperonyl butoxide, and a phosphorus-based antioxidant.   The pest control resin composition according to claim 1, wherein the thermoplastic resin is polyolefin.   The pest control resin composition according to claim 2, wherein the thermoplastic resin is polyethylene.   The pest control resin composition according to claim 1, wherein the thermoplastic resin is polyester.   The resin composition for controlling insects according to claim 1, wherein the pyrethroid compound is permethrin. The resin composition for controlling insect pests according to claim 1, wherein the phosphorus-based antioxidant is a compound represented by the general formula (I).

^{(Wherein, R 1, R 2, R} 4, and ^{R 5} are each independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, cycloalkyl group having 5 to 8 carbon atoms, 6 to 12 carbon atoms Represents an alkylcycloalkyl group, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group, R ³ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X is a simple bond, a sulfur atom, or — CHR ⁶ -group (R ⁶ represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms) A represents an alkylene group having 2 to 8 carbon atoms, or * —COR ⁷ — group (R ⁷ represents a simple bond or an alkylene group having 1 to 8 carbon atoms, and * represents that it is bonded to the oxygen side) Y and Z are either Either one is a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or a carbon number It represents 12 aralkyloxy group, the other is a hydrogen atom, or an alkyl group having 1 to 8 carbon atoms.)   Phosphorous antioxidants are tris- (2,4-di-t-butylphenyl) phosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (2,6-diphenyl). -T-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,4-di-cumylphenyl) pentaerythritol diphosphite, tetrakis (2,4-di-t-butylphenyl) -4,4 ' -Biphenylenediphosphonite, 6- [3- (3-t-butyl-4-hydroxy-5-methyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d, f] [1 , 3,2] -dioxaphosphin and bis- [2,4-di-t-butyl (6-methyl) phenyl] ethyl phosphite , Claim 1 pest control resin composition.   The phosphorus antioxidant is 6- [3- (3-t-butyl-4-hydroxy-5-methyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d, f] [1. , 3, 2] -dioxaphosphepine, the pest control resin composition according to claim 1.   The pest control resin composition according to claim 1, wherein the surface of the thermoplastic resin is coated with one or more selected from a pyrethroid compound, piperonyl butoxide, and a phosphorus-based antioxidant.   A resin molded article for pest control, which is formed by melt-molding the pest control resin composition according to claim 1.   The resin molded product for controlling insect pests according to claim 10, which is a thread.   A pest control net, wherein the yarn according to claim 11 is knitted or woven so as to form a large number of meshes.

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